The SN74LVC1G123 device is a single retriggerable monostable multivibrator designed for
1.65-V to 5.5-V VCC operation.

This monostable multivibrator features output pulse-duration control by three methods. In
the first method, the A input is low, and the B input goes high. In the
second method, the B input is high, and the A input goes low. In the third
method, the A input is low, the B input is high, and the clear
(CLR) input goes high.

The output pulse duration is programmed by selecting external resistance and capacitance
values. The external timing capacitor must be connected between Cext and
Rext/Cext (positive) and an external resistor
connected between Rext/Cext and
VCC. To obtain variable pulse durations, connect an external variable
resistance between Rext/Cext and
VCC. The output pulse duration also can be reduced by taking
CLR low.

Pulse triggering occurs at a particular voltage level and is not directly related to the
transition time of the input pulse. The A and B inputs have Schmitt triggers
with sufficient hysteresis to handle slow input transition rates with jitter-free triggering at the
outputs.